WEST SYSTEM 406 Colloidal Silica

 406 Colloidal Silica is a thickening agent for epoxies, polyesters, and urethanes. This Fumed Colloidal Silica can be used to thicken resins to the user desire by adding varying amounts. Colloidal Silica is ideal for making adhesives and putties for gluing wood, fiberglass, stone, concrete, etc. Cures OFF WHITE but can make cured resins much more difficult to sand.